These 5mm cone-tipped markers have a strong and resistant tip. They can be used to draw fine lines from .75mm up to thicker lines of 3mm. The versatile conical shaped tip makes them ideal for use on both smaller drawings and larger works like mural posters. The ink is water-based and produces bright colors that are mixable and easy to apply. The 50-color set comes with a clear briefcase carrier for easy transportation.